Imgur Downvote Fairy

/*
    Paste this into the Javascript console of your web browser.
    This works everywhere where there is a upvote/downvote button.

    If you want to ignore the upvote/downvote button for the image you're viewing, but still upvote/downvote for everything else, replace this line:
      if (!hasClass(list.item(i), 'pushed'))
    with this one:
      if (!hasClass(list.item(i), 'pushed') && !hasClass(list.item(i), 'title'))

    Works while viewing gallery images, a user's comments, and while viewing an image.
    This will not honor your previous vote for a comment or image, unless it matches what you want the vote to be.

    If you wanna be an upvote fairy instead, just replace the word "down" with "up".

    I regret nothing. Enjoy.
*/
function hasClass(element, cls) {
    var r = new RegExp('\\b' + cls + '\\b');
    return r.test(element.className);
}

var list = document.getElementsByClassName('down');
for (var i = 0; i < list.length; ++i) {
   if (!hasClass(list.item(i), 'pushed')) /* Don't spam Imgur's servers! It also helps us do this quicker */
       list.item(i).click(); /* Equivalent of pushing the button */
}